Fluid-pressure motor



Nov. 17, 1925, l 1,562,122

J. R. OISHEI FLUID PRESSURE MOTOR Original Filed Oct. 24, 1921 2 Sheets-Sheet l 7 Q @l 2 m m l ;n" I, :T T 5 A I 1 I l /0/ 41 ffif-fH-J- *al j /7 l l /5T\ 5 J e T /1 rra @ME )45,

Nov. 17,1925. 1,562,122

y J. R. olsHEl FLuD'PREssURE MOTOR original Filed oct. 24, 1921 g shetsheet 2 /A/l/E/VTOH rela-meay Nov. 17,1925. l

UNITED" -STATES PATENT oFFwEp-f JOHN It. OISHEI, OF BUFFALO, NEW YORK. FLUID-PRESSURE MOTOR.

February 8, 1923.

T all lwhom z't mag/'concern l Be it known that I, JOHN R. Orsnnr, a

citizen of the United States, residing ,atv

Buffalo, in the countyof Erie and State of New York, haveinvented a new and useful Im rovement in Fluid-Pressure Motors, of

whlch the following is a specification.

also to produce a motor in which the operating mechanism is compact and small and which will operate on relatively rlow pressures; also to provide a fluid pressure motor with an improved controlling valve mechanism; and further, to provide improvements y -in Huid pressure motors in the other respects F ingrt e invention.

`hereinafter set forth andv claimed.

' i 1 is a face view of a motor embodyig. 2 is a top planview thereof, ig. 3 `is a sectional elevation thereof on line 3 3, Fig. 2. Y. y p Y Fig. 4 is a similar lview showing the parts in another position.

Fig. 5 is a portion of a thereof showing certain of ythe parts instill another position. p v y 'I Fig. 6 is a cross sectionon line 6-6,Fig. 3, on an enlarged scale.

Fi 7 is a sectional elevation thereof on line -7, Fig. 2. y 'l Fig. 8 is an enlarged horizontal section throu h one ofthe valve chambers, `on line 8 8, ig. 6.

Fi 9 is a sectional view ofthe piston cham r thereof.

In the embodiment of the inventionA ripheral walls of these portions are prefersectional elevation e plane ofthe axis Serial No. 617,873.

ably roundedtransversely.v The rock shaft B is preferably concentric `with the-two seg- I Original application filed November l24, 1921, 4Serial No.. 509,822. ZDivideni and this application filed.v

mental portions ofthe fluid"chamberand'-v carries avane-ll located and adapted yto swing in the .chamber 10. This vane corresponds in shape `with the cross sectional shape of the lchamber 10, its opposite ends fittinw ,the two portions 10"L and 10" of the chamber, and is adapted to be swung in the chamber by pneumatic pressure. The vane has a pressure receiving portion of given area at one side of the rock shaft and a pressure receiving portion of lesser area at the opposite side of the rock shaft, the pressure receiving portions at opposite sides of the rock shaft being in the same Huid pressure chamber. `The vane can be packed to give it a lit in ,the 'chamber and insure positive movement ofthe piston by the pneumatic pressure, in'suitable manner, as for instance by packingA disks secured to the opposite inner faces of thev vane. The described shape o f, the 'vane and its chamber lends itself. readily to proper packing 'of the vane since it enables the use of cupped leatherpacking disks 12V and there are no corners or angles which are hard to pack and apt to leak. v, The edges of the packing disksextend inwardly toward each other continuously around the vane as indicated at 11? and 11f and lprovide flanged edges extending continuously around the ed es of the lvane' and contact. y with the cham er. The bearing openings forthe rock shaft B can be packed by suitable packing rings or material 13 surrounding the rockshaft at oppositesid'es of the vane. The casing preferably further invcludes a valve housing or chamber 14.- located behind the pressure chamber.A As-preferably constructed, the casin includes a main bodyl portion and a remova le top portion 15 bolted or otherwise suitably secured on the body portion. The body portion is formed as an open top chamber having opposite ends A2 and As and-the vane or piston is notI bodily movable but swings parallel with-and is at all timesin contact with the ends of the casing which has a continuous curved side 10^. As'illustrated, a removable rear or cover plate 16 may be provided Outside of the casing to form the valve chamber 14.

As best ,illustrated in Fig. 9, the parts are so arranged that the` vvane has pressure receiving portions of given area 11a at one side of its pivot and pressure recelving portions 11b of lesser area at opposite sides of its pivot.

Pneumatic pressure for operating the vane and driven shaft is preferably provided in the following manner: 17 represents a iexible tube or other suitable pipe which is connected to the intake manifold ofan automobile engine, or other means for producing a suction or partial vacuum, and is attached as by a nipple 18 to the motor casing A. This nipple is connected by a suction passage 19| and branches 19a thereof in the motor casing, see Figs. 3 and 4, to two valve chambers 20 and 20a which -in turn are connected by ports 21 and 21 with the chamber 10 at opposite sides of the vane. Preferably a screw needle valve 22 is provided which is adapted to be adjusted toward and from aseat in the passage 19 for regulating and shutting off the flow of air through this passage to thereby control, as desired', the operation of, or stop the motor, as hereinafter explained. Atmospheric air is first admitted to one side of the vane and applied simultaneously to the unequal area pressure receiving portions 11c and 11d at opposite sides of the shaft B and the air is withdrawn 4from the reverse side of thev vane connecting with the suction passage 19, and then atmospheric air is admitted to the last-mentioned side of the vane and applied y simultaneously to the unequal area pressure receiving portions 11a and 11b, and the firstmentioned sidel of the vane chamber placed in communication with the suction passageshaped seat 26 at the inner end of t e valvev chamber. The outer seat 25 is conveniently formed on the inner end of a threaded plug 27 which is screwed into the outer end o f the valve chamber and has a Flong ritudinal hole 28 through it by which atmospheric air pressureis admitted to the valve chamber. The valve can be inserted into or removed from the valve chamber or its position with relation to the valve seats adjusted by moving the screw plug 27. Each valve is provided with a stem 29 extending through the hole 28. The valve stem and its hole 28 can be of any appropriate shape to permit the passage of air through the hole around the valve stem when the valve is moved inwardly off of the outer seat 25. As shown, the valve stems are providedA with small longitudinal grooves 30. The body of each valve is also shown as ,gn-owed;l at 31 to permit iiow of air from the hole 28 to the port 21. Each valve is provided with a spring 32 which tends to seat the valve on its outer seat 25 and resistsl movement of the valve towards its inner seat. The spring 32 may be of any desirable size and strength and may be adjusted by screwing plug 27 in or out more or less as is necessary or desirable, so as to resist to a desired extent any force or forces tending to seat the valve on its inner seat. When the valves are in the position shown in Fig. 3, with the valve 23 on its inner seat and the valve 231 on its outer seat, the right hand side of the vane chamber is connected with the suction passage 19 through the passage 21a and valve chamber 20'. The other valve 23 being seated against. its inner seat shuts off communication between the left hand side of the vane chamber and the suction paage 19 and admits atmospheric pressure through the adjacent admissionl openings 28, valve chamber 20 and passage 21 to the left hand side of the vane chamber. The vane thereupon swings counter-clockwise and the positions of the valves are reversed to cause opposite or clockwise swinging of the vane.

Means are provided for rocking or actuating the valves. In the embodiment of the invention shown, 33 represents a valve actuating rocker or oscillating member preferably pivoted at its lower end on a suitable stud or pivot 34. This rocker 33 is provided in its upper portion with an opening 35 or bifurcated part through which the rock shaft B passes and which permits the rocker to move on its pivot 34 from the inclined position shown in Fig. 3 to the. oppositely inclined position shown in Fig. 4. The rocker is provided with lateral arms 36 and 36a arranged to strike the stems of the valves 23 and 23UL respectively for shifting the valves from their outer to their inner seats.

When the vane swings in the chamber, it operates through suitable means, such for example as the mechanism presently described, to swing the rocker 33 from one to the other of its inclined positions for shifting the valves to reverse the swing of the vane. In order to insure a quick, positive movement of the.

valves, the rocker is preferably acted upon hy a spring which acts when the rocker 33 has been moved beyond a central position in either direction to then quickly and positively complete the movement of the rocker and the reversing of the valves. The spring mechanism shown for this purpose is as follows :-37 indicates a plate or spring-stresslng member which is loosely'pivoted on .the

rock shaft B at one side of the rocker 33', and

38 indicates a plate at the opposite side of the rocker, Hxed on the rock shaft in any suitable Way tofrock therewith. The loose plate plate 38. A spring 41 connects the loose `37 has a stud 39 thereon which projects beplate and the rocker 33, this spring being preferably a spring wire having its middle portion coiled around a stud 42 on the loose plate and having its opposite bowed legs or ialves attached at their ends to a stud 43 on the lower end of the rocker 33 below the rocker pivot. shaft B move in one direction, one of the shoulders on the fixed plate 38 will engage the stud 39 and swing the loose plate 32( 1n the same direction and compress or stress the spring 41't/1ntil the spring stud 42 passes a central position in a line connecting the axes of the rock shaft B and the pivot 34 of the rocker 33. Then the spring 41 will act to throw the rocker 33 quickly over to its other inclined positionand reverse the positions of the valves 23 and 23a before the vane fully reaches the limit of its'swing, so that the valves are in position to cause immediate reversal of vane. In the opposite swing of the vane the spring 41 acts in a similar manuel to quickly throw the rocker 33.back to the initial position.

In the position of the parts shown in Fig. 3, the valve 23 is against its inner seat and the valve 23 against its outer seat. The

right hand side of the vane chamber is then connected with thesuction passage 19 and atmospheric air is permitted to pass the valve 23 and enter to the left hand side of the vane chamber through the port 21, thereby rotatingnthfe 'vane counter-clockwise. lVhen the vane has rotated far enough for the spring 41 .to throw lthe rocker 33 over to the other inclined position, the rocker will move the valve 23 against its inner seat 26 and release the valve 23 which will then -be moved by the spring 32 against its outer seat the valve 23* and pass through the port 21n to the right hand -side of the vane chamber,

and vthereb cause a reverse or clockwise ro tation of .t 1e vane, see Fig. 4. Fig. 5v shows the relative positions of the rocker 33 and plates 37 and 438 when vthe vane has completed its clockwise rotation and is about to start its counterclockwise rotation.. .Means may be provided for relgasably holding the rocker in each of -its opposite tilted' positions.

For this purpose, as shown, there; may be provided 'a spring 44 secured Vin the valve'f housing 14 and having a bent portion adaptcd'to engage oppositely inclined faces 45 and 46 at the end of one of th'e'rocker arms, as 36. Thisy 'spring prevents laccidental movement of the'rocker to an intermediate posi-v tion', in which both' valvesl23 and 23. might When the vane 1l and rock Atmospheric air will gthen enter past:

occupy like positions and interfere with the proper'starting of the motor. I claim as vmy invention: I.

i 1. KA fiuid `ressure motorhaving a fluid pressure cha-in er with concentric curved op- .positely disposed inner wall portions'of different radii extending from;` an `axis be- .tween' said opposite inner-'wall portions, a

vane having apair of packing portions wlth. edges in contact with said wall portions the edges of said packing portions being bent inwardly toward each. other, a rock shafty secured to said vane, the `axis of said rock shaft coinciding with said first named casing in which said vane fits and operates,

said vane extending above and below saidl rock shaft and having fluid obstructing packing havingflanged edges arranged continuously around all of its edge and over and around the sides of said' shaft at the vane edge and contacting contlnuously'wltlr all sides and ends of the casing and said casing conforming interiorly'to the edge of said-vane. 3. A fluid pressure motor having a single` pressure chamber with 'two'concentric seg mental circular .peripheral portions of different radii extending from opposite-sides of the axis of said peripheries, as 'win ing vane eccentrically pivoted by a ,rock s aft insad chamber on the axis of said vperiphe'ries andhaving on each working face pres# sure receiving portions at opposite sides 0f- 1ts plvot, one pressure receivmg portion of each face. being of greater area lthan the other vpressure 'receiving face, means for subjecting t e opposite pressure receiving portions of one-face of said vane simultaneously to equal fluid pressures .and withdrawing pressure from the pres-l sure receiving -portions of the other face,

portion of said I said vane having continuous packing por- 'tions extending in onel piece from one of said peripheries tony the other across and -around said rock shaft and having continuous flangededges contacting with both peripheries. and ends of the chamber completelyaround the vane, whereby the vane lis r completely .across said rock shaft.

` l JOHN R. 'OISHEL packed at its outerl edges and I l 'Certificate of Correction.

Itis hereby certiiedthat in Letters Patent No. 1.562,122, rantedNovelnber 17, 1925, upon the application ofrJohn R. Oishei, of Buffalo, ew York, for an provement in Fluid-Pressure Motors, an' error ap ears in the printed specification requiring correction as follows: Page l, in the hea ing, line 5, original application ilindate, for November24, 1921, read October 24, 1921,' and that the said Let,- tersto the record of the oase in the Ptent Oce.

Signed and sealed this 5th day of October, A. D. 1926.,

[SEAL] M. J. MOORE, j

, Acting Commissionerof Patents.-

atent should be read with this correction therein that the Saune may conform` 

